Dell 3-DNS Administrator's Manual page 156

Glossary
standby unit
static load balancing modes
static site content
subdomain
sub-statement
sync group
time tolerance value
Topology mode
Glossary-10
A standby unit is a system in a redundant system that is always prepared to
become the active unit if the active unit fails.
Static load balancing modes base the distribution of name resolution
requests to virtual servers on a pre-defined list of criteria and server and
virtual server availability; they do not take current server performance or
current connection load into account.
Static site content is a type of site content that is stored in HTML pages, and
changes only when an administrator edits the HTML document itself.
A subdomain is a sub-section of a higher level domain. For example, .com is
a high level domain, and F5.com is a subdomain within the .com domain.
A sub-statement is a logical section within a statement that defines a
particular element in the statement. A sub-statement begins with the
sub-statement name followed by an open brace ( { ) and ends with a closed
brace ( } ). Everything between those braces is part of the sub-statement.
Sub-statements typically define a group of related variables, such as the
calculation coefficients used in Quality of Service load balancing.
A sync group is a group of 3-DNS Controllers that share system
configurations and path metrics for data center servers and virtual servers.
Sync groups have one principal 3-DNS, and may contain one or more
receiver systems. The receiver systems obtain their configuration
information from the principal system. See also principal 3-DNS, receiver
3-DNS.
The time tolerance value is the number of seconds that one 3-DNS
Controller's clock is allowed to differ in comparison to another 3-DNS
Controller's clock, without the two clocks being considered out of sync.
The Topology mode is a static load balancing mode that bases the
distribution of name resolution requests on the weighted scores for topology
records. Topology records are used by the Topology load balancing mode to
redirect DNS queries to the closest virtual server, geographically, based on
location information derived from the DNS query message.